单项选择题

Our future will be ______on what services we can provide.

A． basic
B． based
C． basing
D． base
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单项选择题
The new agent has experience ______not expertise.
A． but
B． and
C． with
D． however
单项选择题
The sales division reported a 64 percent drop ______the last sales period.
A． during
B． with
C． at
D． to
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